Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1780/MrKynastonsFamousDance.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5122-MrKynastonsFamousDance.ps) >>/Users/jc/w/tmp/Tune-5122-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1780/MrKynastonsFamousDance.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_5122.log 157767 Log file, useful mostly for debugging
Tune-5122-MrKynastonsFamousDance.abc 159 ABC music file with the extracted tune(s)
Tune-5122-MrKynastonsFamousDance.ps 6 PostScript
Tune-5122-MrKynastonsFamousDance.txt 159 Plain-text file with the extracted tune(s)
Tune-5122-get.log 18618 Log file, useful mostly for debugging
Tune-51221-get.log 4477 Log file, useful mostly for debugging
Tune-51223-get.log 9249 Log file, useful mostly for debugging
Tune-51224-get.log 14181 Log file, useful mostly for debugging
Tune-51225-get.log 13183 Log file, useful mostly for debugging
Tune-51226-get.log 9016 Log file, useful mostly for debugging
Tune-51227-get.log 5518 Log file, useful mostly for debugging
Tune-51229-get.log 9081 Log file, useful mostly for debugging
These files should be available for 24 hours.